Aug 30 10:51:06.010 INFO checking merkle-generator-0.2.0 against master#545f22340f72ee0efaf6463efb43a2840e3d35db for pr-53699
Aug 30 10:51:06.010 INFO running: cargo +545f22340f72ee0efaf6463efb43a2840e3d35db-alt check --frozen --all --all-targets
Aug 30 10:51:06.010 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53699/master#545f22340f72ee0efaf6463efb43a2840e3d35db:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53699/worker-2/master#545f22340f72ee0efaf6463efb43a2840e3d35db:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +545f22340f72ee0efaf6463efb43a2840e3d35db-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 30 10:51:06.199 INFO blam! b553deb0be61f3b9c318a509c5a778b40df73a58eed492676c1aacdbb9d0f56f
Aug 30 10:51:06.201 INFO running `"docker" "start" "-a" "b553deb0be61f3b9c318a509c5a778b40df73a58eed492676c1aacdbb9d0f56f"`
Aug 30 10:51:06.841 INFO kablam!     Checking flat-tree v1.1.0
Aug 30 10:51:07.600 INFO kablam!     Checking merkle-generator v0.2.0 (file:///source)
Aug 30 10:51:08.830 INFO kablam! warning: unused variable: `roots`
Aug 30 10:51:08.830 INFO kablam!    --> src/lib.rs:142:26
Aug 30 10:51:08.830 INFO kablam!     |
Aug 30 10:51:08.830 INFO kablam! 142 |     fn leaf(leaf: &Node, roots: &Vec<Node>) -> Vec<u8> {
Aug 30 10:51:08.830 INFO kablam!     |                          ^^^^^ help: consider using `_roots` instead
Aug 30 10:51:08.831 INFO kablam!     |
Aug 30 10:51:08.831 INFO kablam!     = note: #[warn(unused_variables)] on by default
Aug 30 10:51:08.831 INFO kablam! 
Aug 30 10:51:08.929 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 2.12s
Aug 30 10:51:08.935 INFO kablam! su: No module specific data is present
Aug 30 10:51:09.328 INFO running `"docker" "rm" "-f" "b553deb0be61f3b9c318a509c5a778b40df73a58eed492676c1aacdbb9d0f56f"`
Aug 30 10:51:09.471 INFO blam! b553deb0be61f3b9c318a509c5a778b40df73a58eed492676c1aacdbb9d0f56f